.dn {
  display: none;
}
div {
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
img[src=""] {
  display: none;
}
/*====== 建议body给稿子底色背景 ==============*/
body,
html {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 500px;
  overflow: hidden;
}
.pg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
